[valgrind] [Bug 373069] New: memcheck/tests/leak_cpp_interior fails with GCC 5.1+
https://bugs.kde.org/show_bug.cgi?id=373069 Bug ID: 373069 Summary: memcheck/tests/leak_cpp_interior fails with GCC 5.1+ Product: valgrind Version: unspecified Platform: unspecified OS: Linux Status: UNCONFIRMED Severity: normal Priority: NOR Component: memcheck Assignee: jsew...@acm.org Reporter: aleksandar.rik...@imgtec.com Target Milestone: --- Memcheck's leak_cpp_interior test has purpose to test heuristics for detecting some common cases, where the pointer is pointing in the middle of the block, but the chunk is not lost. One of such cases is old implementation of string that has format: [_Rep] *_M_length * [basic_string]_M_capacity * _M_dataplus _M_refcount * _M_p > unnamed array of char_type New library ABI introduced in GCC 5.1 includes new implementation of std::string. In new implementation pointer is no longer displaced from the beginning of the chunk. This causes failing of leak_cpp_interior test. >From GCC version 5.1.0, allocation of exceptions in libstdc++ is changed. Before GCC version 5.1.0 emergency buffer was statically allocated. In version 5.1.0 it is swapped with object of class poll with dynamically allocated arena. This change also causes failing of leak_cpp_interior test. Memcheck detects dynamically allocated block of 72,704 bytes for 64bit architectures or 18,688 bytes for 32bit architectures, that is not visible when using older versions of libstdc++. -- You are receiving this mail because: You are watching all bug changes.
[valgrind] [Bug 373069] New: memcheck/tests/leak_cpp_interior fails with GCC 5.1+
https://bugs.kde.org/show_bug.cgi?id=373069 Bug ID: 373069 Summary: memcheck/tests/leak_cpp_interior fails with GCC 5.1+ Product: valgrind Version: unspecified Platform: unspecified OS: Linux Status: UNCONFIRMED Severity: normal Priority: NOR Component: memcheck Assignee: jsew...@acm.org Reporter: aleksandar.rik...@imgtec.com Target Milestone: --- Memcheck's leak_cpp_interior test has purpose to test heuristics for detecting some common cases, where the pointer is pointing in the middle of the block, but the chunk is not lost. One of such cases is old implementation of string that has format: [_Rep] *_M_length * [basic_string]_M_capacity * _M_dataplus _M_refcount * _M_p > unnamed array of char_type New library ABI introduced in GCC 5.1 includes new implementation of std::string. In new implementation pointer is no longer displaced from the beginning of the chunk. This causes failing of leak_cpp_interior test. >From GCC version 5.1.0, allocation of exceptions in libstdc++ is changed. Before GCC version 5.1.0 emergency buffer was statically allocated. In version 5.1.0 it is swapped with object of class poll with dynamically allocated arena. This change also causes failing of leak_cpp_interior test. Memcheck detects dynamically allocated block of 72,704 bytes for 64bit architectures or 18,688 bytes for 32bit architectures, that is not visible when using older versions of libstdc++. -- You are receiving this mail because: You are watching all bug changes.
